[CMake] Testing for a target broke for me

[Richard Shaw]

Ok, I didn't notice my replies going to Norman only, apologies.

Answer from upstream is that it returns true if the target exists, it does
not care from a ExternalProject POV that the target has been built. The
documentation has been clarified.

I have it working properly now testing for the existence of wx-config which
will only exist if it's been built.

Thanks,
Richard
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